Carabid beetle assemblages (Coleoptera, Carabidae) across urban-rural gradients:: an international comparison
Carabid beetle assemblages (Coleoptera, Carabidae) across urban-rural gradients:: an international comparison
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DOI：
10.1023/a:1021270121630
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发表时间：
2002-10-01
影响因子：
5.2
通讯作者：
de Oca, EM
中科院分区：
文献类型：
--
作者：
Niemelä, J;Kotze, DJ;de Oca, EM
我们研究了三个城市（芬兰赫尔辛基、保加利亚索非亚和加拿大埃德蒙顿）沿城市-郊区-城乡梯度的残留森林斑块中的瓢虫群落，以研究它们对城市化的反应。只有芬兰瓢虫在群落结构上有明显的梯度分化。在保加利亚和加拿大，瓢虫并没有分成明显的城市、郊区和农村社区。研究结果为在城市化等干扰下物种丰富度下降、机会性物种获得优势、小型物种数量增加等预测提供了一定的支持。瓢虫对这种干扰的反应相当微弱和多样，表明局部因素及其相互作用对群落组成至关重要。在三个城市化水平上，每一个梯度上都出现了相当相似的瓢虫群落，这表明通常与城市化相关的栖息地变化并未影响剩余城市森林斑块中瓢虫群落的生态完整性。
We studied communities of carabid beetles in residual forest patches along urban-suburban-rural gradients in three cities (Helsinki, Finland; Sofia, Bulgaria and Edmonton, Canada) to examine their responses to urbanisation. Only Finnish carabids showed a marked division of community structure along the gradient. In Bulgaria and Canada, carabids did not separate into distinct urban, suburban and rural communities. Our results provide some support for the predictions that species richness will decrease, that opportunistic species will gain dominance, and that small-sized species will become more numerous under disturbance such as that provided by urbanisation. The rather weak and varied response of carabids to this disturbance suggests that local factors and their interaction are of primary importance for community composition. Occurrence of reasonably similar carabid communities across the gradient at each of the three levels of urbanisation suggests that habitat changes commonly associated with urbanisation have not affected the ecological integrity of carabid assemblages in residual urban forest patches.